Making compounds of nitrocellulose or similar substances.



silicates of methyl, ethyl, an

sPEcmIcATioN formingpart of Letters Patent No. "794,581, dated .1 1; 9 AED815011 in d. J 16 1904' S '81 N 189 286. pp 9 anuaryv 0 F J concern:are to take place after 7 the other ingredients to form th I asm use dsuch as silicate same proportion of the finest subdivision it will makethese substances almost totally non-inflammable; but in all the methodsso far devised, which simply unite silicic acid or its salts bymechanical mixture, such a result have found that the most scribe areused with an acid,-t

is not obtained. I

cates are to be ad he mixture of the pyroxylin, camphor, solvent, andacid after acid or any acid that will 7 these latter have beenthoroughly mixed and its and from u flmy Otherwise called s1l1 c1 cesters. It s well undercan always be calculated stood that nowninchemistry. i

It will be amount of acid in the compound into pure he mass allows of byhaving the volatile silicates in excess. As thisis a compound ofnitrocellulose which must be mad cipitation of none of the usualsilicate of sodium non-1nflammab1lity is concerned,

' of the salts soluble in water,

of an acid With the silicic volatile liquids mentioned to form thesilicic 'acid by reaction as by reaction with the acids used leave andthen using an antacid, like carbonate of a soluble salt in the compound,and I disclaim lime, as-an addition to neutralize the'free the mixtureof acid and silicates, which proacid other than silicic acid formed inthe comduces the colloid silicates,

d, as described in Specification No.

9, ebruary 12, 1901, or using sorbent, like sulfate of lime, to retainthe free in an inert or harmless manner, as described in SpecificationNo. 743,422, Novemher 9, 1903. In either case these additions thoroughmixture of found best not to use the full better handling e compound.

hen the non-aqueousliquid silicates I dereadily with the'nitrocellulosecompounds and pound of nitrocellulose containing free silica whichgivesa combination absolutely new and and free acid, forme by adding thesilicic not heretofore obtained. esters and acid, substantially asdescribed. 5

' What I claim is 3. The process of forming a non-inflamma- 5 1.Anon-inflammableor slow-burning cOrnble or slow-burning compound ofnitrocellupound of nitrocellulose and similar substances, lose, by theaddition of tree silicates, an aci produced by the addition to the usualconand an absorbent, substantially as described.

stituents thereof the non-aqueous silicates 0t w ethyl, methyl and amyland similar silicates DAVID BACHRAQH 10 known as silicic esters, andat'ree aci Witnesses.

substantially as described. M. L. Ronmson,

2. A non-inflammable or slow-burning com- MARIE EQKHARDT.

